36 CFR 13.26 - Picnicking.
(a) Signs posted at conspicuous locations, such as normal points of entry or reasonable intervals along the boundary of the affected park locale;
(b) Maps available in the office of the Superintendent and other places convenient to the public;
(c) Publication in a newspaper of general circulation in the affected area; or
(d) Other appropriate methods, including park Web sites, brochures, maps, and handouts.